Horseshoe.



No. 741,110. PATBNTBD OCT. 1s, 1903. Y

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UNITED STATES :Patented October 13, 1903.

FRED N. CLINE, OF CHICAGO, ILLINOIS.

HoRsEsHoE.

SPECIFICATION forming part of Letters Patent No. 741,110, dated October 13, 1.903.

Application iledADeoember 29,1902. Serial No. 186,996. (No model.)

To a/ZZ whom it may concern.-

Be it known that I, FRED N. CLINE, acitizen of the United States, residingat Chicago, in the county of Cook and State of Illinois,

have invented new and useful Improvements in Horseshoes, of which the following is a specification, reference being had to the accompanying drawings, forming a part thereof.

This invention is designed as an'improve- [o ment in horseshoes having rubber calks, the

specific purpose being to cheapen and increase the efficiency of the construction by which the calks are removable without removing the shoe. It consists in the features i5 of construction set out in the claims.

In the drawings, Figure 1 is a .planof a horseshoe embodying my invention, having one of the heel-calks shown in full and the other with the rubber removed. Fig. 2 is a zo detail section at the line 2 2 on Fig. l. Fig. 3 isa section at the line 3 3 on Fig. 2. Fig. 4 is a view similar to Fig. 3, showing a slight modification.

My improved shoe comprises a body forged,

z5 pressed, or otherwise produced fr omrsuitable metal and having the usual means for securing to the hoof. This body A has a toe-call; 1 of .a special form adapted to prevent the calk from becoming engaged in slots or cre-viees, such as the slots of cable. or underground electric railways, the calk being formed in the arc of a circle, so that while it is narrow enough at the edge to afford secure grip it has by reason of its curvature too great an extent fore and aft to permit it to enter a narrow slot or crevice.

In each heel of the body A there is formed a socket or pocket 2 for receiving and retaining the removable calks.

2 at a point intermediate the rear and forward ends of such pocket.

4 is a metal skeleton or gridiron for holding and giving rigidity to the rubber calk,

which is molded so as to embed said skeleton,

as seen in sectional view of Fig.v 2. v'Ihis skeleton is adapted to lit the pocket 2, and it has a lug 5 projecting-,alongside the'lug 3,

5o the contiguous faces of the two lugs being substantially at right angles to a line extending lengthwise of the pocket `from a point In the form shown. 4o in the principal figures there is provideda. lug 3, projecting from the web in the pocket" substantially at the middle of the rear end to the foremost extremity. At the middle of the rear end of the pocket there is formed a slight exterior angular recess 6 for the purpose of affording an exterior face parallel with the contiguous faces of the lugs 3 and 5 that is, at right angles to the line of a bolt to be inserted, as hereinafter described. The angular recess described produces a corresponding angular projection or boss 6a into the pocket, and the skeleton or grdiron 4 has a corresponding angulairecess 7 and a corresponding inwardly-protruding boss 8. .The lugs 3 and 5 have coinciding apertures 9 and 10 in line with apertures 11 and 12, the former in the boss 6a and the latter in the boss 8. 13 is a bolt or screw which is inserted through the apertures 11, 12, 9, and 10 and intermediately penetrates the rubber 14, in which the skeleton or gridiron 4 is embedded. This bolt or screw has a smooth terminal 15, which extends throughvthe apertures 9 and 10 in the lugs 3 and 5, fitting them close enough to prevent looseness or rattling of the parts which are thus held in connection. The aperture`12-'in'the boss 8 is threaded, and the bolt 13 is correspondingly threaded at 16 over the shoulder next the head, sothat when the bolt is inserted it may be screwed into the boss 8,' and thereby held. Preferably but not necessarily, the bolt has a tapered head, andthe aperture 1l is exteriorly countersunk to lodge4 such head, and the thread 16 is preferably formed over the whole of the shoulder up to the headso that the bolt may be screwed inV far enough to'clamp theskeleton 4 against the rear wallYV of the pocket in which it was lodged, and thus more effectually prevent any rattling, whichlmight result if the skeleton were fitted loosely to the pocket. Intermediate the shoulder having the thread 16 and the terminal 15, which'engagesthe apertures in the lugs 3 and 5, I prefer to form this bolt with a spiral in or thread 17, substantially such as is customary on screws for engaging wood, and for like purpose I give the bolt aslight taper over this portion, which, it will bev understood, extends through the rubber and is engaged therewith,l being screwed into it as into wood. Preferably in ordery to steer the bolt directly through the rubber the latter is formed in molding with an aperture in the right position-that is, in line between the apertures in the boss S and lug 3-said aperture, however, being no larger than necessary to accommodate the shank or unreduced portion of the bolt, leaving the rubber for the engagement of the thread or iin when the bolt is screwed into it. As may be underv stood, the action of a screw cutting its way into rubber in this manner lays the fibers of the rubber in the direction in which they are drawn by the inward-rotation progress of the screw, so that they tend very stubbornly to resist back screwing. It is for the purpose of this action that I make the bolt so as to engage the rubber as a screw, thereby insuring its retention in place during the use of the shoe, the rubber thus substantially operating with the effect of a lock-n ut. This effect may be greatly increased and rendered substantially positive by mutilating the thread 17, as seen at 20, so as to form upon one or more turns ofthe spiral a ratchet-like tooth slopingin direction to permit the screw to be advanced, but having its abrupt shoulder in the direction to resist reverse movement. This ratchet formation should not be sufficiently prominent to prevent the forcible retraction of the screw when a tool is applied to the head, but only to prevent it from working back when the shoe is in use.

The lugs 3 and 5 may be dispensed with by making thebolt longenough to extend through the whole length of the pocket and protrude its terminal 18 throughthe forward web ofthe skeleton or gridiron 4 and into the wall of the pocket at the forward end. This construction is illustrated in Fig. 4, the apertures 19 in the skeleton and 18 in the wall of the pocket being provided for this purpose. I have indicated the screw in this construction with the same numeral, 13, as the other, the only difference being in length.

I claim- 1. Ahorseshoe, comprising, in combination with a base adapted for fastening to the hoof and having on ythe under side pockets for heelcalks,'calks for the same consisting each of a metal skeleton and a rubber body in which the skeleton is embedded, the skeleton being adapted to fit the pocket, and a bolt extending through the rear wall of the pocket and rear web of the skeleton and engaging the skeleton and the base at a forward point, such bolt having a threaded portion, and one of the apertures through which it passes being correspondingly threaded for engagement therewith.

2. A horseshoe, comprising a metal base adapted to be fastened to the hoof and having pockets for heel-calks; calks for the same comprising each a metal skeleton and rubber body in which the skeleton is embedded, the skeleton being adapted to fit the pocket in the base, the rear wall of the pocket and the rear web of the skeleton being apertured to receive a retaining-bolt, and said skeleton and base having, respectively, at the forward point, parts contiguous at a transverse vertical plane apertured to receive such bolt, the bolt having a wood-screw thread engaging the rubberintermediate the rear and forward engagements of the bolt with the metal parts.

3. A horseshoe comprising a metal base and detachable heel-calks, the latter consisting of a metal skeleton embedded in a rubber body and bolts securing the calks to the base, having a portion which penetrates the rubber provided with a wood-screw thread,the thread being formed with ratchet-like irregularities having abrupt shoulders facing in direction to resist retraction of the screw.

4. Ahorseshoe,comprisingametal baseand detachable heel-calks lodged in pockets in the base, said calks consisting each of a metal skeleton and a rubber bodyin which theskeleton is embedded, the skeleton having al peripheral web which is contiguous to the Wall of the pocket, a bolt for securing the calk to the base inserted through the pocket-Wall and the contiguous web of the skeleton and having a threaded engagement with the latter and a wood-screw formation beyond such threaded engagement and being engaged with the rubber at the portion having such formation.

In testimony whereof I have hereunto set my hand, in the presence of two witnesses, at Chicago, Illinois, this 22d day of December, A. D. 1902.

FRED N. CLINE.

CHAs. S. BURTON, FRED G. FISCHER. 

